Interrelated power delivery controls – including engine control – Transmission control – Including fluid drive
Reexamination Certificate
2005-02-01
2005-02-01
Estremsky, Sherry (Department: 3681)
Interrelated power delivery controls, including engine control
Transmission control
Including fluid drive
C477S068000, C477S111000, C074S730100, C074S473160
Reexamination Certificate
active
06849028
ABSTRACT:
A propelling transmission control apparatus for a working vehicle having a hydrostatic stepless transmission comprises a variable displacement type hydraulic pump (35), a change speed control mechanism (80) for converting a displacement of a control device (55) to a control displacement for varying a swash plate angle of the hydraulic pump, a fixed displacement main hydraulic motor (36) and a variable displacement auxiliary hydraulic motor (37) connected in series to the hydraulic pump. A common output shaft receives rotational output from both motors. A control piston (35) varies the swash plate angle of the auxiliary hydraulic motor, is connected to a pressure oil supply line (39) for supplying both hydraulic motors with pressure oil, and is operable to vary the swash plate angle of the auxiliary hydraulic motor (37) such that the auxiliary hydraulic motor (37) has an increased volume with a pressure increase applied to the control piston (38).
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Horiuchi Yoshifumi
Nakatani Yasunobu
Estremsky Sherry
Kubota Corporation
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